package com.xiaolun.netty.groupchat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class GroupChatServer {
	private int port; //监听端口
	public GroupChatServer(int port) {
		this.port = port;
	}
	//编写run方法，处理客户端的请求
	public void run() throws Exception {
		//创建两个线程组
		EventLoopGroup bossGroup = new NioEventLoopGroup(1);
		EventLoopGroup workerGroup = new NioEventLoopGroup(); //8个NioEventLoop
		try {
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup, workerGroup)
					.channel(NioServerSocketChannel.class)
					.option(ChannelOption.SO_BACKLOG, 128)
					.childOption(ChannelOption.SO_KEEPALIVE, true)
					.childHandler(new ChannelInitializer<SocketChannel>() {
						@Override
						protected void initChannel(SocketChannel ch) throws Exception {
							//获取到pipeline
							ChannelPipeline pipeline = ch.pipeline();
							//向pipeline加入解码器
							pipeline.addLast("decoder", new StringDecoder());
							//向pipeline加入编码器
							pipeline.addLast("encoder", new StringEncoder());
							//加入自己的业务处理handler
							pipeline.addLast(new GroupChatServerHandler());
						}
					});
			System.out.println("netty 服务器启动");
			ChannelFuture channelFuture = b.bind(port).sync();

			//监听关闭
			channelFuture.channel().closeFuture().sync();
		} finally {
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}

	public static void main(String[] args) throws Exception {
		new GroupChatServer(7000).run();
	}
}
